Messages sent to alias+detail end up in INBOX

Hi, everyone!

I have seemingly correct settings for details to work: when I send a message to user+detail@mydomain.tld, it goes into the "detail" folder of user@mydomain.tld.

Also I have working aliases, so when I send a message to alias@mydomain.tld, it goes into the INBOX folder of user@mydomain.tld.

I expected that when I send a message to alias+detail@mydomain.tld, it would go into the "detail" folder of user@mydomain.tld. However, it goes into the INBOX folder of user@mydomain.tld.

Is it the intended behavior?

Pertinent settings: recipient_delimiter·=·+ lda_mailbox_autocreate·=·yes

Or are these settings not the only ones pertinent to the case?

-- Respectfully, Denis Shadrin